UGN3503U PDF

Each Hall-effect integrated circuit includes a Hall sensing element, linear amplifier, and emitter-follower output stage. Problems associated with handling tiny analog signals are minimized by having the Hall cell and amplifier on a single chip. All output-voltage measurements are made with a voltmeter having an input impedance of at least 10 k?. Magnetic flux density is measured at most sensitive area of device located 0. A, Dwg.

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Each Hall-effect integrated circuit includes a Hall sensing element, linear amplifier, and emitter-follower output stage.

Problems associated with handling tiny analog signals are minimized by having the Hall cell and amplifier on a single chip. All output-voltage measurements are made with a voltmeter having an input impedance of at least 10 k?. Magnetic flux density is measured at most sensitive area of device located 0. A, Dwg. A, www. A south magnetic pole, presented to the branded face of the Halleffect sensor will drive the output higher than the null voltage level.

A north magnetic pole will drive the output below the null level. In operation, instantaneous and proportional output-voltage levels are dependent on magnetic flux density at the most sensitive area of the device.

Greatest sensitivity is obtained with a supply voltage of 6 V, but at the cost of increased supply current and a slight loss of output symmetry. In two applications shown, a permanent bias magnet is attached with epoxy glue to the back of the epoxy package. The presence of ferrous material at the face of the package acts as a flux concentrator.

The north pole of a magnet is attached to the back surface if the integrated circuit is to sense the absence of ferrous matrial. Calibrated linear Hall devices, which can be used to determine the actual flux density presented to the sensor in a particular application, are available.

MHA Dwg. MAA in 1. MAA mm 0. Supplied in bulk pack pieces per bag or add "TR" to part number for tape and reel. MHE in 1. Tolerances on package height and width represent allowable mold offsets. Dimensions given are measured at the widest point parting line. Height does not include mold gate flash. Recommended minimum PWB hole diameter to clear transition area is 0. Minimum lead length was 0. If existing product to the original specifications is not acceptable, contact sales office before ordering.

Where no tolerance is specified, dimension is nominal. Supplied in bulk pack pieces per bag. No dimensional tolerance is implied or guaranteed for bulk packaging pieces per bag. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc.

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Hall Effect sensors are used to detect changes in a magnetic field, and can be used for limit control, revolution counting, and current sensing. What is the Hall Effect? The hall effect is a phenomenon first published by Edwin Hall in , as part of his doctoral thesis. His original experiments involved laying a thin layer of gold leaf on a sheet of glass, with connections at each end and along its length.

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